Yes. We provide life-time free upgrade at this time for this product, even if we change pricing old customers will still have right for free upgrades.
For example, if you purchased iStorage Server iSCSI SAN 1.6, you will be registered as a iStorage Server customer. This means that any upgrades to the software that are and will be released (e.g.., 2.08, 2.20, 3.xx…) are included free of charge.
You can download most up-to-date version at: